Apparatus for setting the twist in yarn



Nbv. 30, 1954 E. J. MASICH ET AL APPARATUS FOR SETTING THE TWIST IN YARN Filed Oct. 12 1950 ORNEY H m f m p m W 5 PH]! IP N/LAE/Q 50 BECK N Nm k Ell/AI I/// United States Patent Office 2,695,509 Patented Nov. 30, 1954 2,695,509 APPARATUS FOR SETTING THE TWIST IN YARN Edward J. Masich and Philip Miller, Yonkers, and Leo Beck, New York, N. Y., assignors to Alexander Smith, Incorporated, White Plains, N. Y., a corporation of New York Application October 12, 1950, Serial No. 189,772 1 Claim. (Cl. 68-5) This invention relates to an apparatus for setting the twist in yarn and more particularly to an apparatus for accurately controlling the degree of set.

The invention is particularly applicable to imparting a temporary straight set to frieze yarn which is so highly twisted as to cockle or curl when the tension is removed. Such yarn cannot be woven as pile on an Axminster loom when in cockled form due to the irregular positioning of the ends as they protrude from the tubes of the Ax: minster spools. It has accordingly been proposed to apply a temporary set to such yarns while held under sufiicient tension to remove the cockle or curl prior to winding the yarn on the Axminster loom spools. After weaving the pile is treated to remove the temporary straight set whereupon the yarn resumes its cockled form. In this process, however, it is necessary to control accurately the degree of temporary set so that it can be readily removed without interfering with the permanent set of the cockled yarn by the light steaming customarily employed in the Axminster finishing process. It is accordingly an object of the present invention to provide an apparatus by which this accurately controlled temporary set may be produced.

Another object is to provide an apparatus for the above purpose which may be used without introducing an additional step into the usual weaving process.

Various other objects and advantages will be apparent as the nature of the invention is more fully disclosed.

The nature of the invention will be better understood by referring to the following description, taken in connection with the accompanying drawing in which one embodiment thereof has been set forth for purposes of illustration.

In the drawing:

Fig. 1 is a diagrammatic view of one type of apparatus embodying the present invention showing the steam tube and manifold in elevation and the lefthand end in section; and

Fig. 2 is an enlarged transverse section taken on the line 22 of Fig. 1.

Referring to the drawing more in detail, the yarn 1s shown as wound on a redoubler bobbin 11 in the form in which it is received from the redoubler frame. This yarn is of a highly twisted or reverse twisted type which would cockle or curl if relaxed in tensionless form, but is held in straight form on the bobbin 11 due to the tension of the winding. The yarn may or may not have a permanent set in cockled form.

In the usual Axminster process the yarn is wound from the redoubler bobbin 11 onto a setting frame spool 12 which is used for setting the various ends on an Axmmster loom spool.

In the embodiment shown in Fig. 1 the yarn 1s fed from the bobbin 11 over a guide roller 14, then through a horizontal tubular setting chamber 15 and over a guide roller 16 onto the setting frame spool 12 which is rotated on a shaft 17 by suitable means, not shown.

The setting chamber 15 comprises a horizontal tube having a cylindrical side wall 19 with a longitudinal opening or slit 20 therein which is covered by a flap 21, attached to the side wall 19 by a hinge 22 or hinges, and held closed by hinge springs 23. The ends of the chamber 15 are closed by discs 25 having slots 26 registering with the slit 20 and providing sufficient clearance for the yarn to pass freely through the tube.

A setting agent such as steam or a fluid containing a chemical setting agent is introduced from a pipe 28 to a horizontal manifold 29 which extends below and along the chamber 15 is connected by a plurality of vertical ducts 30 with the bottom of the setting chamber 15. The

excess fluid, or condensate in the case of steam, is drained from the chamber 15 into the manifold 29 through the ducts 30 and from the manifold 29 through a drain 31.

In operation the steam or other setting agent is introduced into the manifold 29 under a pressure which is above atmospheric only by the amount required to produce steam flow, so that the setting chamber 15 is maintained full of steam at substantially atmospheric pressure and a negligible quantity of steam escapes through the slots 26 in the end closure discs 25. The steam flow can normally be so regulated that only sufiicient steam is supplied to compensate for the steam which is'absorbed by the yarn, in which event no appreciable amount of steam escapes from the chamber 15.

Both the steam pressure and the rate of feed of the yarn can be accurately controlled so as to produce any desired setting condition. In order to produce a limited temporary set it has been found that with the yarn passing through the chamber at the rate of 10 feet per second and with the chamber 15 three feet long, giving a time of treatment of 7 second, a temporary set is produced which is sufiicient to permit the yarn to be wound on the Axminster loom spools and woven as pile on the Axminster looms while in the straight condition. This temporary set however is readily removed by the steaming to which the woven fabric is customarily subjected in the finishing operation and when the set is so removed the pile tufts revert to the form in which they were originally set under more drastic setting condition.

It is to be understood that the apparatus may be used for imparting a permanent set by increasing the temperature of the setting agent or byincreasing the time of treatment or by incorporating a chemical setting agent in the fluid supplied to the setting chamber.

In order to insert the yarn in the setting chamber 15 it is only necessary to hold the yarn at two points beyond the ends of the setting chamber, insert the yarn under the flap 21 and into the end slots 26, and in case of yarn breakage the yarn may be rethrcaded in a similar manner.

It will be evident that the apparatus above described permits setting of the twist under accurately controlled conditions without introducing additional steps into the usual spinning and redoubling technique normally employed in Axminster weaving.

Although a specific embodiment of the invention has been shown for purposes of illustration it is to be understood that various changes and modifications may be made therein as will be readily apparent to a person skilled in the art.

What is claimed is:

An apparatus for setting the twist in yarn, comprising a horizontal tubular member having side walls formed with a longitudinal slot extending the entire length thereof and end walls having radial slots communicating with said first slot for the insertion of the yarn into said member, flap means movably attached to said sidewall for covering substantially the entire longitudinal slot therein, a horizontal manifold for carrying a gaseous setting agent extending along and below said tubular member, ducts connecting said manifold with the bottom of said tubular member to supply said setting agent thereto and to drain condensate therefrom, means draining condensate from said manifold, and means feeding said yarn axially through said tubular member at a con trolled rate.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,165,819 Ware Dec. 28, 1915 1,330,534 Hertel et al Feb. 10, 1920 1,403,126 Lyth Jan. 10, 1922 1,975,036 Dulken Sept. 25, 1934 2,149,708 Von Recklinghausen et al. Mar. 7, 1939 2,228,260 Dreyfus et al Ian. 14, 1941 2,228,272 Kinsella Jan. 14, 1941 2,249,875 Whitehead July 22, 1941 2,351,110 Davidson June 13, 1944 2,398,856 Reel Apr. 23, 1946 2,555,065 Thomson et al. May 29, 1951 

